It的用法讲与练 学案--高考英语一轮复习.docx

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1、It的用法一、人称代词1，it的最基本用法是作代词，主要指刚提到的事物，以避免重复: They watched the train until it disappeared in the distance.2.，也可以指动物或婴儿(未知性别的婴儿或孩子): Is this your dog？No, it isnt.They got a baby and it was a ten-pounder3.，也可指抽象事物或指抽象环境和情景:I hate it when people talk with a full mouth.二、.非人称代词1.it有时并不指具体的东西而泛指天气、时间、日期、距离、

2、价值、度量、温度、环境等： .指天气：It is a lovely day, isnt it? .指时间: It was nearly midnight when she came back.指日期:It is April First today. .指距离:It is some 3000 kilometers from A to B.指价值:It is three dollars. .指温度:Today it is 30 degrees centigrade. 三、 作形式主语，替代主语从句，动词不定式，或动名词短语：1.作形式主语替代主语从句It is clear ( obvious， t

3、rue， possible， certain.) that It is very clear that hes round and tall like a tree.It is certain that every effect must have a cause. It is important ( necessary， right， strange， natural.) that 从句 It is important that we (should) learn English well.It is necessary that he (should) remember these wor

4、ds. It is said (reported/ learned/believed/consider/thought/known/told/hoped.) that 从句 It is said that he has come to Beijing.It is reported that another earth satellite has been put into orbit. It is suggested ( advised/ ordered / demanded/ insisted/ commanded/recommend/acknowledged. ) that It is s

5、trongly suggested that the meeting ( should ) be put off. It is widely acknowledged that students are under great pressure . It is time ( about time ，high time ) that从句(动词用过去时did/should do) It is time that children went to bed. It is the first ( second . ) time that从句(从句用现在完成时 have done ) It was (从句

6、用过去完成时had done ).常译为是第一（二）次。 It is the first time I have been here. It was the first time that I had participated in the exchange student program,which not only broaden my horizon but also improved my confidence. It is a pity ( a shame /an honour/a good thing/a fact,/a surprise/no wonder. ) that从句.

7、It is a pity that he is ill. It is no wonder thatyoure tired,youve beenwalkingfor hours. It seems/ looks/appears that从句.常译为 “ 碰巧,似乎是,看起来” It seems that he will be back in a few days. 看来(9) It happens (seems, looks，,appears ) that从句.常译为 “ 碰巧”It happened that he met his teacher in the street.(10)It oc

8、curs to/comes to/ strikes/ hits sb. that从句. 常译为“某人突然想起.” It occurstomethat Iforgottolockthe door!Ithitme thatthisforeignerwasthe oneIsawinthesupermarket!（11） It goes without saying that从句. 意为“不言而喻”It goes saying that taking exercise can help us keep fit and release stress.2. 作形式主语替代不定式 It is kind (

9、of sb. ) to do sth. 常见的词有：bad ， brave ， careless， clever ， cruel ， foolish ， good （好心的）， honest ， horrible ， kind ， lazy ， modest ， naughty ， nice（有教养的）， polite， rude ， silly ， stupid ， wise ， 如:It is kind of you to say so. = You are kind to say so. It is necessary ( for sb. ) to do sth. . 常见的形容词有：i

10、mportant， necessary， natural, easy ， safe ， common ， normal ， hard ， difficult ， dangerous ， 如:It is important for her to come to the party.It takes sb. . to do sth. 常译为做要花费某人。 如:It took thousands of people many years to build the Great Wall. 3. 作形式主语替代动名词短语It is no good / no use / useless doing sth

11、. 常译为 “有好处或没有用” It is no good learning English without speaking English. Its useless trying to argue with Shylock.五、作形式宾语，代替不定式，动名词短语或宾语从句。We think it important to learn a foreign language.该句型中的it 作形式宾语，该结构中常用的动词有：think, believe, make ,find consider, feel. 如:They found it difficult that they would f

12、inish their work in two days.The Internet makes it easier for companies to keep in touch with customers.Sending too much time online is unhealthy and makes it very difficult to focus on other things in life.I owe it to him that I finished my work in time.Some of us always take it for granted that ou

13、r parents should take care of us.六、.it的重要句型 1.强调句型: It is/was + 被强调部分 + that 从句 (被强调的主语如果是人，that可以由who换用)It was about 600 years ago that the first clock with a face and an hour hand was made. It was they that (who ) cleaned the classroom yesterday.It is generally believed that it is humans activitie

14、s that lead to the global warming.2.主语+动词+it+ when/if/that从句能用于这类句式的的动词有enjoy，dislike，like，hate，love，dont mind，be fond of，feel like，appreciate，see to，rely on,depend on ,count on等。如：I dislike it when you whistle. 我不爱听你吹口哨。She wont like it if you arrive late. 她不喜欢你迟到。I dont like it when you get angry.

15、 我不喜欢你生气的样子。He hates it when people use his bike. 他讨厌别人用他的自行车。I hate it if you say such things in public. 我讨厌你在大庭广众之下说那样的事。We really appreciate it when she offered to help. 她来帮忙了，我们十分感激。I cant help it if he is always angry.他总是发火，我也没办法。You can depend on it that he is honest. 你就相信吧，他很诚实。Please see to

16、it that you bring enough money when you go out. 出门时，请确保带足钱。七 It的一些习惯用法when it comes to.当提到时As someone puts it, . 像某人所说的那样It looks / seems as if . 看起来好像Think it over 考虑考虑Make it 办到；做成；成功Give it a try. 尝试一下。Thats it . 这就对了。Take it up .行动起来。Just do it. 想做就做；坚持不懈。Go for it. 努力争取；大胆一试。Got it. 知道了；做到了；成功了

17、。Take it easy. 别着急；慢慢来How is it with your study? 学习好吗？Thats it . 这就对了。It is all over with sb. .完蛋了。Fight it out.坚持到底。I cant help it. 我没有办法。I take it that.我认为.Hows it going？近况如何？Believe it or not.信不信由你。let it go算了吧.Forget it . 忘了吧；别再想了Take it. 成交； 我买了。Beat it. 走开；滚。练习1.If you are time poor , you need

18、 run for only half the time to get the same benefits as other sports , so perhaps we should all give _ a try.(2018高考)2.Sarah made _ to the airport just in time to catch her plane this morning.3.New technologies have made _ possible to turn out new products faster and at a lower cost.4.The employment

19、 rate has continued to rise in big cities thanks to the efforts of the local governments to increase _.5.Why dont you bring _ to his attention that youre too ill to work on?6.Online shopping websites and social media apps have made _ much easier for the public to spend more on gifts for their loved

20、ones.7._was when I got back to my apartment that I first came across my new neighbors.(2017天津)8.Peoples self-consciousness often made_less possible for them to express their appreciation.9.It was with the help of the local guide _the mountain climbers were rescued.10._was not until near the end of the letter that she mentioned her own plan.Key:1it 2it 3it 4it 5it 6it 7It 8it 9that 10 It学科网（北京）股份有限公司